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Measurement of the photocatalytic efficiency of FN NANO®2 coating on an idealized urban model
Nosek, Štěpán
An experiment was conducted to test the effectiveness of the FN NANO®2 coating in removing a harmful pollutant (NOX) by photocatalysis on a surface in a model of an urban street canyon. The experiment was conducted in a wind tunnel under controlled conditions, simulating two cases of street canyon pollution: from a line source within the canyon and a polluted incoming boundary layer. The results showed that the coating has an average efficiency of 15% when removed from NOX, with the efficiency decreasing with height within the street canyon. The removal efficiency depends on the type of pollution. In the case of the polluted incoming boundary layer, the coating showed very high efficiency in removing NO (average efficiency of 19%) and NO2 (average efficiency of 7%). These results show that both methods can be used to analyse the removal of NOX concentrations by the FN NANO®2 coating in a street canyon.
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Measurement of photocatalytic efficiency of FN NANO®2 coating on Legerova street model
Nosek, Štěpán
An experiment was conducted to test the effectiveness of the FN NANO®2 coating in removing a pollutant (NOX) by photocatalysis on a surface in a model of a real urban street canyon. The experiment was conducted in a wind tunnel under controlled conditions and simulated the case of pollution of a Legerova street model by an upwind boundary layer polluted by NOX concentrations from a car. The results showed that the coating has a higher degradation efficiency for NO (up to 15%) than for NOX (max. 12%), with the efficiency depending on the investigated position. The lowest efficiency was achieved in streets aligned parallel to the upwind boundary layer, which are naturally better ventilated.
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The Urban Exposure Management Tool for Assessment of Exposure of Residents to Urban Air Pollution
Barták, M. ; Smolík, Jiří ; Dohányosová, Pavla
The Urban Exposure tool is a new software tool designed to enable governments and local authorities to model the exposure of residents to urban air pollution during all their daily activities, such as working, travelling or sleeping. The Urban Exposure tool is relevant for anyone with an interest in air quality and air quality management; environmental managers, planners, consultants and academics. Human exposure to particulate pollution is modelled in a variety of user specified environments and for a variety of activities. Scenarios are constructed using a simple to use Graphical User Interface, which allows the user to specify a range of parameters.
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Urban air pollution related to the specific meteorological condition
Tesař, Miroslav
The main objectives of the present project are: (i) To create and maintain the monitoring system for the occult precipitation observation and assessment (i.e. sample taking active devices were installed in the chosen urban areas and both active and passive collectors were installed in the comparative mountainous region ); (ii) to examine if site-to-site differences in cloud and fog water chemical composition exist in the urban areas with various contaminant load; (iii) to assess the dependence of the pollutant concentration on the fog type and meteorological conditions; (iv) to work out the so-called climatological standards describing the frequency and duration of the individual types of occult precipitation for each locality; (v) to study the physical basis of the cloud and fog water deposition on the solid obstacle with the use of the mathematical modelling (using of the micrometeorological model).
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